-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Sandy
Rutherford
Sent: Wednesday, June 22, 2005 3:09 AM
To: Ted Mittelstaedt
Cc: freebsd-questions@freebsd.org; Alex Zbyslaw
Subject: RE: Yet another RAID Question (YARQ)
On Wed, 22 Jun 2005 01:00:09 -0700
On Wed, 22 Jun 2005 23:37:20 -0700,
Ted Mittelstaedt [EMAIL PROTECTED] said:
Seagate wrote a paper on this titled:
Seagate Technology Paper 338.1 Estimating Drive Reliability in
Desktop Computers and Consumer Electronic Systems
that explains how they define MTBF. Basically, they
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Sandy
Rutherford
Sent: Thursday, June 23, 2005 1:15 AM
To: Ted Mittelstaedt
Cc: freebsd-questions@freebsd.org
Subject: RE: Yet another RAID Question (YARQ)
On Wed, 22 Jun 2005 23:37:20 -0700,
Ted
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Sandy
Rutherford
Sent: Tuesday, June 21, 2005 6:16 PM
To: Alex Zbyslaw
Cc: freebsd-questions@freebsd.org; Ted Mittelstaedt
Subject: Re: Yet another RAID Question (YARQ)
On Mon, 20 Jun 2005 11:36:32 +0100
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of P.U.Kruppa
Sent: Monday, June 20, 2005 6:28 AM
To: Ted Mittelstaedt
Cc: P.U.Kruppa; freebsd-questions@freebsd.org
Subject: RE: Yet another RAID Question (YARQ)
As for knowing if a disk has failed,
I think
On Wed, 22 Jun 2005 01:00:09 -0700,
Ted Mittelstaedt [EMAIL PROTECTED] said:
With a RAID-1 card, mirroring, there are 2 ways to setup reads.
The first way makes the assumption that you are mirroring purely
for fault tolerance. In that case you would NOT see a ANY read from
the second
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of P.U.Kruppa
Sent: Monday, June 20, 2005 9:28 AM
To: Ted Mittelstaedt
Cc: P.U.Kruppa; freebsd-questions@freebsd.org
Subject: RE: Yet another RAID Question (YARQ)
On Mon, 20 Jun 2005, Ted
Steve Bertrand wrote:
I know this technique isn't feasable in all situations, but I try to
have duplicate hardware. Especially with my IDE RAID1 servers, I'll from
time to time during a maintenance window pop one of the RAID disks out,
throw it in another box and ensure BOTH machines boot up
On Mon, 20 Jun 2005 11:36:32 +0100,
Alex Zbyslaw [EMAIL PROTECTED] said:
Ted Mittelstaedt wrote:
Sandy
Rutherford
Sent: Sunday, June 19, 2005 10:52 PM
In order to boost read performance, a RAID card should interleave
reading from a RAID-1 volume by reading alternately from
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Sandy
Rutherford
Sent: Sunday, June 19, 2005 10:52 PM
In order to boost read performance, a RAID card should interleave
reading from a RAID-1 volume by reading alternately from one drive and
then the other.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of P.U.Kruppa
Sent: Sunday, June 19, 2005 6:37 PM
To: Ted Mittelstaedt
Cc: P.U.Kruppa; freebsd-questions@freebsd.org
Subject: RE: Yet another RAID Question (YARQ)
On Sun, 19 Jun 2005, Ted Mittelstaedt wrote
Ted Mittelstaedt wrote:
Sandy
Rutherford
Sent: Sunday, June 19, 2005 10:52 PM
In order to boost read performance, a RAID card should interleave
reading from a RAID-1 volume by reading alternately from one drive and
then the other. You can see this in alternate blinking of the
activity
On Mon, 20 Jun 2005, Ted Mittelstaedt wrote:
On Sun, 19 Jun 2005, Ted Mittelstaedt wrote:
What model of Proliant?
ML 350 G4
Oh good, we have a customer that has been looking at one of these
for FreeBSD and I'm glad to hear that you didn't have problems with it.
Absolutely smooth - and I
P.U.Kruppa wrote:
our school has just received a new HP ProLiant and I set up FreeBSD
5.4 -RELEASE with a RAID 1 system on it (using ciss driver).
Is there any software tool which can show me the state of the two SCSI
discs (if one is failing or if they are mirrored sorrectly) or is it
On Sun, 19 Jun 2005, Alex Zbyslaw wrote:
P.U.Kruppa wrote:
our school has just received a new HP ProLiant and I set up FreeBSD 5.4
-RELEASE with a RAID 1 system on it (using ciss driver).
Is there any software tool which can show me the state of the two SCSI
discs (if one is failing or if
What model of Proliant?
Ted
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of P.U.Kruppa
Sent: Saturday, June 18, 2005 10:56 PM
To: freebsd-questions@freebsd.org
Subject: Yet another RAID Question (YARQ)
Hi everbody,
our school has just received a new HP
On Sun, 19 Jun 2005, Ted Mittelstaedt wrote:
What model of Proliant?
ML 350 G4
Uli.
Ted
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of P.U.Kruppa
Sent: Saturday, June 18, 2005 10:56 PM
To: freebsd-questions@freebsd.org
Subject: Yet another RAID
On Sun, 19 Jun 2005 12:28:14 +0100,
Alex Zbyslaw [EMAIL PROTECTED] said:
A word of caution, though. A Linux system (which I help administer) had
two SCSI disks mounted as RAID-1 through some kind of Adaptec
controller. Recently the machine crashed and it transpires that one of
the
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